Why were split systems developed?
A) Splitting the controls into two panels provides redundancy.
B) Splitting the airflow between two pieces allows for more airflow.
C) Splitting the refrigerant flow between two systems reduces line size.
D) It is not always practical to have all the components of a large air-cooled system located in a single box.
D
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An evacuated insulated tank is connected to a pipe transporting steam at 800 kPa and 400°C. A valve is then opened and steam fills the tank. The temperature in the tank when P = 800 kPa is nearest:
A) 582°C B) 543°C C) 528°C D) 505°C
A magnesium alloy contains the following volumes of each element: 341.2 cubic decimeters of magnesium, 30.96 cubic decimeters of aluminum, 488.0 cubic centimeters of manganese, and 672.0 cubic centimeters of zinc. Find the percent composition by volume of zinc. Round the answer to the nearest hundredth percent.
Fill in the blank(s) with the appropriate word(s).
Which type of economizer is capable of choosing between the use of outside air or return air, based on the
enthalpy of the two airstreams? a. All economizers b. Enthalpy economizers c. Integrated economizers d. Dry-bulb economizers
____ schedules are typically provided to detail the circuits and overcurrent protection required for distribution equipment.
What will be an ideal response?